<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入Vue -->
    <script src="../js/vue.js"></script>
    <title>05_更新时的一个问题</title>
</head>
<body>
    
    <!-- 
             
     -->


    <!-- 容器 -->
    <div id="root">
        <!-- 遍历数组 -->
        <h2>人员列表</h2>
        <button @click="updateMei">单击修改马冬梅</button>
        <ul>
            <li v-for="(p,index) in persons" ::key="p.id">
                {{p.name}} - {{p.age}} 
            </li>
        </ul>

        
    </div>

    <script type="text/javascript">
       Vue.config.productionTip=false; // 阻止 vue 在启动时生成生产提示。

      
       // 用 computed 实现
       const vm= new Vue({
            el:'#root',
            data:{
                persons:[
                    {id:1001,name:'马冬梅',age:18,sex:'女'},
                    {id:1002,name:'周冬雨',age:19,sex:'女'},
                    {id:1003,name:'周杰伦',age:20,sex:'男'},
                    {id:1004,name:'温兆伦',age:20,sex:'男'},
                ],
                keyword:'',
                sortord:0 , // 0原序 1升序 2降序
                 
            },
            methods:{
                updateMei(){
                    // this.persons[0].name='马老师' //奏效
                    this.persons[0] =  {id:1001,name:'马老师',age:50,sex:'男'};
                }
            }
            
        })
       
    </script>
</body>
</html>